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Jeremy Andrews
e11fc9b4cf
2to3 . --fix print -wn Essentially, print is a function instead of statement. Ref: PEP 3105 https://peps.python.org/pep-3105/
48 lines
1.4 KiB
Python
Executable File
48 lines
1.4 KiB
Python
Executable File
#!/usr/bin/python
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#
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# Read ASN.1/PEM PKCS#7 on stdin, parse it into plain text,
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# then build substrate from it
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#
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from pyasn1_modules import rfc2315, pem
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from pyasn1.codec.der import encoder, decoder
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import sys
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if len(sys.argv) != 1:
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print(("""Usage:
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$ cat pkcs7Certificate.pem | %s""" % sys.argv[0]))
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sys.exit(-1)
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idx, substrate = pem.readPemBlocksFromFile(
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sys.stdin, ('-----BEGIN PKCS7-----', '-----END PKCS7-----')
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)
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assert substrate, 'bad PKCS7 data on input'
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contentInfo, rest = decoder.decode(substrate, asn1Spec=rfc2315.ContentInfo())
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if rest: substrate = substrate[:-len(rest)]
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print((contentInfo.prettyPrint()))
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assert encoder.encode(contentInfo, defMode=False) == substrate or \
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encoder.encode(contentInfo, defMode=True) == substrate, \
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're-encode fails'
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contentType = contentInfo.getComponentByName('contentType')
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contentInfoMap = {
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(1, 2, 840, 113549, 1, 7, 1): rfc2315.Data(),
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(1, 2, 840, 113549, 1, 7, 2): rfc2315.SignedData(),
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(1, 2, 840, 113549, 1, 7, 3): rfc2315.EnvelopedData(),
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(1, 2, 840, 113549, 1, 7, 4): rfc2315.SignedAndEnvelopedData(),
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(1, 2, 840, 113549, 1, 7, 5): rfc2315.DigestedData(),
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(1, 2, 840, 113549, 1, 7, 6): rfc2315.EncryptedData()
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}
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content, _ = decoder.decode(
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contentInfo.getComponentByName('content'),
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asn1Spec=contentInfoMap[contentType]
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)
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print((content.prettyPrint()))
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